CN201408646Y - Vacuum extractor of transformer - Google Patents
Vacuum extractor of transformer Download PDFInfo
- Publication number
- CN201408646Y CN201408646Y CN200920056462XU CN200920056462U CN201408646Y CN 201408646 Y CN201408646 Y CN 201408646Y CN 200920056462X U CN200920056462X U CN 200920056462XU CN 200920056462 U CN200920056462 U CN 200920056462U CN 201408646 Y CN201408646 Y CN 201408646Y
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- Prior art keywords
- vacuum
- transformer
- delay
- power
- power supply
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- Expired - Fee Related
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Abstract
The utility model discloses a vacuum extractor of a transformer. A vacuum gauge is arranged inside a chamber body of the transformer or on an air suction pipeline of a vacuum pumping set, the vacuum gauge is provided with a circuit contact pair which is closed when vacuum degree measured by the vacuum gauge achieves a set value, the circuit contact pair is directly connected into a power supplyingcircuit of an off delay time relay to control on and off of the power supplying circuit of the off delay time relay, or on and off of the power supplying circuit of the off delay time relay are controlled through a relay, the off delay time relay is provided with a normally closed contact which delays to be switched off, and the normally closed contact which delays to be switched off is connectedinto the power supplying circuit of the vacuum pumping set to control on and off of the power supplying circuit of the vacuum pumping set. After vacuum degree of evacuation of the vacuum extractor achieves the preset value, vacuum degree holding time of the transformer is controlled continuously and automatically by the time relay without having to arranging special work staff to monitor and control. Further, the vacuum extractor of a transformer is low in labor cost and convenient and accurate in control.
Description
Technical field:
The utility model relates to a kind of device that transformer is vacuumized of being used for.
Background technology:
When high-power transformer is installed, need carry out vacuum pumping, vaccum-pumping equipment with the vacuum degree of transformer after being extracted into set point, usually can not stop at once vacuumizing, and need on this basis transformer to be continued to vacuumize a period of time, be the usually said vacuum degree retention time, meet the required requirement of work with the vacuum degree of reliable assurance transformer.And for the transformer of different size and condition of work, vacuum degree that its work is required and vacuum degree retention time are often also inequality, when vacuumizing, need to arrange special operating personnel monitoring in real time and control vacuum degree retention time, meet the requirements to guarantee to vacuumize, its human cost height, workload are big, and make mistakes easily.
The utility model content:
The purpose of this utility model is to provide a kind of vacuum extractor of the vacuum of control transformer automatically, to realize the automatic operation of transformer vacuum, reduces human cost and workload that transformer vacuumizes.
The vacuum extractor of transformer of the present utility model, comprise the vacuum pump group that extracts air in the transformer, the air intake duct of vacuum pump group is communicated with transformer, the blast pipe of vacuum pump group is communicated with atmosphere, in the cavity of its transformer or on the air intake duct vacuum gauge is installed, there is the circuit contact of closure in the time of reaching set point in the vacuum degree that vacuum gauge records right on the vacuum gauge, this circuit contact is to the break-make of control power-off delay type time relay power supply circuits in the power supply circuits of the direct access power-off delay type time relay, perhaps control the break-make of the power supply circuits of the power-off delay type time relay by relay, the normally-closed contact that the power-off delay type time relay has time-delay to disconnect, the normally-closed contact that its time-delay disconnects inserts in the power supply circuits of vacuum pump group, the break-make of control vacuum pump group power supply circuits.
The vacuum extractor of transformer described in the utility model, when the vacuum pump group is extracted into set point with the vacuum degree of transformer, circuit contact on the vacuum gauge is to closure, circuit contact is to the power supply circuits of the direct conducting power-off delay type time relay, perhaps control the conducting of the power supply circuits of the power-off delay type time relay by relay, the power-off delay type time relay gets electric work, its work is after specified time of delay, automatic disconnection inserts the normally-closed contact that the time-delay in the vacuum pump group power supply circuits disconnects, thereby the vacuum pump group is quit work.Its vacuum degree retention time is controlled by the power-off delay type time relay automatically by the decision of the power-off delay type time relay, does not need to arrange special staff, and human cost is low, and control is convenient, and control accurately.
Description of drawings:
Fig. 1 is a kind of system configuration schematic diagram of vacuum extractor of transformer;
Fig. 2 is a kind of control principle figure of vacuum extractor of transformer;
Fig. 3 is a kind of control principle figure of vacuum extractor of transformer;
Fig. 4 is a kind of control principle figure of vacuum extractor of transformer.
Embodiment:
The vacuum extractor of transformer, as Fig. 1, Fig. 2, comprise the vacuum pump group 1 that extracts air in the transformer, the air intake duct 2 of vacuum pump group is communicated with transformer 3, the blast pipe 4 of vacuum pump group is communicated with atmosphere, in the cavity of its transformer or on the air intake duct vacuum gauge 5 is installed, there is circuit contact right on the vacuum gauge, closure when circuit contact reaches the set point of vacuum gauge to the vacuum degree that records at vacuum gauge, circuit contact is in the power supply circuits that directly are connected on power-off delay type time relay KT1, as Fig. 2, when it is closed, time relay KT1 work, when it disconnected, time relay KT1 did not work.The normally-closed contact KT1-1 that time relay KT1 has time-delay to disconnect, the normally-closed contact that this time-delay disconnects inserts in the power supply circuits of vacuum pump group, connects with the contactor AKM of control vacuum pump group work, when the normally-closed contact KT1-1 that time-delay disconnects is closed, contactor AKM energising, the work of vacuum pump group; When the normally-closed contact KT1-1 that time-delay disconnects disconnects, contactor AKM outage, the vacuum pump group quits work.When it reached set point in vacuum degree, circuit contact was to closure, and the time relay gets electric, and the normally-closed contact that its time-delay disconnects is the meeting automatic disconnection behind delay time, thereby realized the control to the vacuum degree retention time that vacuumizes automatically.
The circuit contact of vacuum gauge 5 is to also controlling the break-make of the power supply circuits of power-off delay type time relay KT1 by auxiliary relay, as Fig. 3, the circuit contact of vacuum gauge is to the coil KA4 of the auxiliary relay of connecting, the normally opened contact KA4-1 of this auxiliary relay connects again in the power supply circuits of power-off delay type time relay KT1, the normally-closed contact KT1-1 that power-off delay type time relay KT1 has time-delay to disconnect, the normally-closed contact KT1-1 that its time-delay disconnects inserts in the power supply circuits of vacuum pump group, connect the break-make of control vacuum pump group power supply circuits with the contactor AKM of control vacuum pump group work.When vacuum degree reaches set point, the circuit contact of vacuum gauge is to closure, the coil KA4 of auxiliary relay gets, it is connected on the normally opened contact adhesive in the time relay power supply circuits, time relay KT1 gets electric work, the normally-closed contact KT1-1 that its time-delay disconnects realizes the automatic control to the vacuum degree retention time that vacuumizes through meeting automatic disconnection behind the delay time.
Described vacuum pump group can be an independent vacuum pump, also can be the multipole pump configuration that forms that a plurality of vacuum pumps are connected mutually.Fig. 1 is the two-stage vacuum pump configuration that is in series mutually by two vacuum pumps, and it is in series by lobe pump 11 and slide valve pump 12, and the air intake duct of lobe pump is communicated with transformer 3, and blast pipe connects the air intake duct of slide valve pump, and the blast pipe of slide valve pump is communicated with atmosphere.It can carry out twin-stage to transformation gas and vacuumizes, and the vacuum degree that vacuumize the efficient height, can be evacuated to is also higher.Electromagnetism charge valve 13 can be installed by the air intake duct place of slide valve pump 12, with the air pressure in the regulating slide valve pump.Between slide valve pump and lobe pump bellows 14 can be installed.
It is how right to optionally connected circuit contact of going into to have on the vacuum gauge of the vacuum extractor of transformer, each circuit contact is to closure when the vacuum degree of vacuum gauge reaches different value respectively, each circuit contact is to all being in series with the coil of an auxiliary relay, the normally opened contact of each auxiliary relay all is connected in the power supply circuits of each self-corresponding power-off delay type time relay, the break-make of the control power-off delay type time relay separately, the normally-closed contact that each time relay all has time-delay to disconnect, the normally-closed contact that the time-delay of all time relays disconnects all series connection is simultaneously gone in the power supply circuits of vacuum pump group, controls the work of vacuum pump group simultaneously.As Fig. 4, a kind of vacuum extractor of transformer, its vacuum gauge 5 has four branch roads that insert power supply, article four, the switch S B1 of selection with branch road access or deenergization all is installed in the branch road, SB2, SB3, SB4, all there is a pair of circuit contact right in every branch road, each circuit contact is to being connected with the coil KA4 of auxiliary relay separately respectively, KA5, KA6, KA7, but the auxiliary relay coil of each branch road is respectively to there being the normally opened contact KA4-1 of adhesive separately, KA5-1, KA6-1, KA7-1, each normally opened contact is connected respectively into a power-off delay type time relay KT1, KT2, KT3, in the power supply circuits of KT4, the break-make of the power supply circuits of the control time relay separately, each time relay KT1, KT2, KT3, the normally-closed contact KT1-1 that KT4 all has time-delay to disconnect, KT2-1, KT3-1, KT4-1, the normally-closed contact that these time-delays disconnect is connected mutually, and connects with the contactor AKM that powers to the vacuum pump group.The circuit contact of its different branch is to being set to closure when the different vacuum degree, can the connect power-off delay type time relay of different delayed time time of the normally opened contact of the auxiliary relay of different branch, select different branch roads to insert power supply by switch, can adapt to different vacuum degrees and the requirement of vacuum degree retention time, the vacuum extractor of an one transformer, can adapt to the instructions for use that vacuumizes of different transformers, applied widely.
Claims (4)
1, the vacuum extractor of transformer, comprise the vacuum pump group that extracts air in the transformer, the air intake duct of vacuum pump group is communicated with transformer, the blast pipe of vacuum pump group is communicated with atmosphere, in the cavity of its transformer or on the air intake duct vacuum gauge is installed, it is characterized in that: have the circuit contact of closure in the time of reaching set point in the vacuum degree that vacuum gauge records right on the vacuum gauge, this circuit contact is to the break-make of control power-off delay type time relay power supply circuits in the power supply circuits of the direct access power-off delay type time relay, perhaps control the break-make of the power supply circuits of the power-off delay type time relay by relay, the normally-closed contact that the power-off delay type time relay has time-delay to disconnect, the normally-closed contact that its time-delay disconnects inserts in the power supply circuits of vacuum pump group, the break-make of control vacuum pump group power supply circuits.
2, the vacuum extractor of transformer according to claim 1 is characterized in that: described vacuum pump group only is an independent vacuum pump, and that perhaps connects mutually for two or more vacuum pumps forms.
3, the vacuum extractor of transformer according to claim 1, it is characterized in that: described vacuum pump group is in series by lobe pump and slide valve pump, the air intake duct of lobe pump is communicated with transformer, and blast pipe connects the air intake duct of slide valve pump, and the blast pipe of slide valve pump is communicated with atmosphere.
4, the vacuum extractor of transformer according to claim 1, it is characterized in that: many branch roads that can insert power supply are arranged on the vacuum gauge of the vacuum extractor of transformer, switch is all arranged on each branch road, every branch road all has circuit contact right, each circuit contact is to closure when the vacuum degree of vacuum gauge reaches different value respectively, each circuit contact is to all being in series with the coil of auxiliary relay, the normally opened contact of the auxiliary relay of described each branch road all is connected in the power supply circuits of each self-corresponding power-off delay type time relay, the break-make of the control power-off delay type time relay separately, the normally-closed contact that each power-off delay type time relay all has time-delay to disconnect, the normally-closed contact that the time-delay of all time relays disconnects is connected in the power supply circuits of vacuum pump group simultaneously, controls the work of vacuum pump group simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920056462XU CN201408646Y (en) | 2009-05-13 | 2009-05-13 | Vacuum extractor of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920056462XU CN201408646Y (en) | 2009-05-13 | 2009-05-13 | Vacuum extractor of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201408646Y true CN201408646Y (en) | 2010-02-17 |
Family
ID=41679589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920056462XU Expired - Fee Related CN201408646Y (en) | 2009-05-13 | 2009-05-13 | Vacuum extractor of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201408646Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615503B (en) * | 2009-05-13 | 2011-11-23 | 广东火电工程总公司 | Vacuum extractor of transformer |
| CN112628116A (en) * | 2020-12-11 | 2021-04-09 | 广西电网有限责任公司桂林供电局 | Sealing test and vacuumizing device applied to transformer |
-
2009
- 2009-05-13 CN CN200920056462XU patent/CN201408646Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615503B (en) * | 2009-05-13 | 2011-11-23 | 广东火电工程总公司 | Vacuum extractor of transformer |
| CN112628116A (en) * | 2020-12-11 | 2021-04-09 | 广西电网有限责任公司桂林供电局 | Sealing test and vacuumizing device applied to transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20180513 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |